[sv-ec] Coverage Methods

  Section 18.7 of SV LRM 1800-2005 on coverage methods states that 
  the get_coverage() method is static and is thus available on both 
  types and instances.
  
  It does not make such a statement for start(), stop() and sample() methods.
  Is it then correct to assume that these methods are not static, and will
  work only on instances? 
  
  Thanks,
  Abhishek.